802.11j: 2004: En anpassning av frekvensuppdelningen för Japan. Like the 802.11b devices, products using this standard will usually need line of site, to function at optimal performance Säkerhet för åtkomstkontroll och kryptering av 802.11, WPA2 är en interoperabilitetscertifiering av en delmängd av denna standard. This A/B/G/N wireless standard is replacing the widely accepted 802.11b standard, due to the fact that the frequency on which it operates is the same, and price has dramatically gone down on products. 802.11b and 802.11g control their interference and susceptibility to interference by using direct-sequence spread spectrum (DSSS) and orthogonal frequency-division multiplexing (OFDM) signaling methods, respectively
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802.11ac offers backward compatibility to 802.11a/b/g/n and bandwidth rated up to 1300 Mbps on the 5 GHz band plus up to 450 Mbps on 2.4 GHz Because of this choice of frequency band, 802.11b/g/n equipment may occasionally suffer interference in the 2.4 GHz band from microwave ovens, cordless telephones, and Bluetooth devices etc. The generation of Wi-Fi that first signaled popular use, 802.11ac uses dual-band wireless technology, supporting simultaneous connections on both 2.4 GHz and 5 GHz Wi-Fi devices.
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